Ford Motor Co. Chairman Bill Ford has canceled an upcoming trip to the Middle East, including a visit to a Saudi investment conference, Reuters reported Sunday.

It was the latest cancellation by an attendee of the Future Investment Initiative since the disappearance and suspected killing of Washington Post contributor Jamal Khashoggi. He disappeared after entering the Saudi consulate in Istanbul, Turkey, on Oct. 2 to obtain paperwork that would allow him to marry his Turkish fiancée, reports have said.

Turkish officials have said they fear a Saudi hit team killed and dismembered Khashoggi, who wrote critically of Saudi Crown Prince Mohammed bin Salman. The kingdom has called such allegations "baseless" but has not offered any evidence Khashoggi ever left the consulate.

Major news organizations and technology firms have also pulled out of the kingdom's upcoming investment forum, a high-profile event known as "Davos in the Desert."

Ford cited scheduling issues and did not elaborate on reasons.

Other reports said that JPMorgan Chase CEO Jamie Dimon won't attend the conference later this month as previously planned.

Blackrock CEO Larry Fink and Stephen Schwarzman, the CEO of investment firm Blackstone, have also withdrawn, CNN reported Monday. Before the weekend announcements, nearly a dozen tech, media and entertainment companies had backed out of the conference.

General Motors and Fiat Chrysler Automobiles said Monday no one from their organizations had planned to attend the event.

Treasury Secretary Steven Mnuchin as of Friday was still planning to attend the summit.

President Donald Trump in a "60 Minutes" interview aired Sunday said the U.S. would "severely punish" Saudi Arabia if it is found to have killed Khashoggi, though he continued to express reluctance to move away from a $110 billion arms deal with the kingdom. He said Monday after talking with the Saudi ruler that "rogue killers" may be responsible for Khashoggi's disappearance.